<div class="box box-solid">
    <div class="box-body table-responsive no-padding">
        <form role="form" method="post" enctype="multipart/form-data">
            <input type="hidden" name="key" class="key" />
            <div class="box-footer">
                <button class="btn btn-primary sub_btn" data-key="push_lock" type="submit">清空推送锁</button> 
                <button class="btn btn-primary sub_btn" data-key="-" type="submit">清空分单锁</button>
                <button class="btn btn-primary sub_btn" data-key="push_print_lock" type="submit">清空打印推送锁</button>
            </div>
        </form>
    </div>
</div>
<script type="text/javascript">
    $(function(){
        $('.sub_btn').click(function(){
            $('.key').val($(this).data('key'));
        })
    })
</script>